ANALYSIS OF WORK-IN-PROCESS INVENTORY CONTROL IN OPTIMIZING PRODUCTION PRODUCTIVITY (CASE STUDY: ALCON BATAM MANUFACTURING)

Abstract

Proper Work-In-Process Inventory Control in Terms of Quantity and Periodicity is a Crucial Variable in Balancing the Production Process in a Manufacturing Company. The right amount of well-controlled Work-In-Process inventory enhances the optimization of production productivity. Unstable Work-In-Process inventory levels in the production line lead to waiting times (downtime), resulting in an unproductive and inefficient production process. The objective of this study is to analyze the implementation and control of Work-In-Process inventory levels about the effectiveness of the production process at Alcon Batam Manufacturing. This research was conducted using a qualitative method through a case study approach, referring to previous research theories to analyze and describe the actual implementation of Work-In-Process inventory control at Alcon Batam Manufacturing, as well as assess its effectiveness in production productivity. The findings of this study recommend the implementation of the Min-Max Stock method as a solution to minimize waiting time in the production flow, thereby optimizing production productivity. The study identifies the optimal Work-In-Process inventory levels for production activities at Alcon Batam Manufacturing for each production process as follows: 871.5 units for Packaging, 1,207.5 units for RFID, 766.5 units for CLTI, 861 units for Buffing, 798 units for Belling and Handpiece, and 1,102.5 units for Coupling.